so called "unstable download speed" is everywhere

all programs download the same, the difference is how they show it - this first build shows the speed every time when a small piece is downloaded ... that is why the speed is so "unstable" ... in next release, I am going to change it little bit ...
other programs show "total average speed" which is counted for whole time the file is being downloaded (this speed is shown in my app after whole file is downloaded), they do NOT show current speed!
what do you mean with "fast about what a great slow beat"